[mythtv-users] nvidia via DVI to LCD TV - no EDID if tv off causing problems

[Paul Kendall]

> Hi
> 
> I have a NVIDIA GPU GeForce 9400 GT running on Ubuntu 10.04 / myth
> 0.23 connected to Panasonic flat screen via DVI using the proprietary
> nvidia driver
> 
> If the TV is on during boot, X configures itself correctly; if it is
> off, the graphics card can't retrieve the EDID info and X can not
> start.
> 
> I have almost worked around this by manually setting xorg.conf.
> However, I have one last problem
> - if the TV is on during boot, the screen is perfect
> - if the TV is off during boot, when I turn it on I can see X is about
> 20 pixels too large on all sides, almost as if overscan is turned on.
> I can correct this by setting the overscan compensation in
> nvidia-settings, but if the next time the system boots the tv is on
> then the screen is too small! (overscan turned off in TV)
> 
> The only difference in Xorg.0.log I can see (except complaints about
> not being able to retrieve EDID)is that if the TV is on, the last line
> of the log reads NVIDIA(0): Setting mode "1280x720_50.00" ; I don't
> get this line if the TV is off during boot. Ican't see how to set this
> mode from the command line- xranrd --output default --mode 1280x720
> --rate 50 does not resize the screen
> 
> My xorg.conf is below- am I missing something?
> 
> John
> 
Hi John
I had a similar problem so I used the nvidia-settings program to save
the EDID to a file (it's on the DFP line in the tree showing your monitor)
and then configure your xorg.conf file using the following line in the
screen section.

Option         "CustomEDID" "DFP-0:/etc/X11/LG-50PC1R-edid.bin"

Obviously, change the DFP-0 to the same thing as what nvidia-settings
says the monitor is.

Cheers,
Paul